Fix pre-compile script calls on Windows build

[roccomoretti]

The windows build test on the test server doesn't seem to be updating options appropriately.

It looks like the issue is that the *.sh files aren't being properly called -- adding "bash" to the front of them allows them to run properly:

Before:

Running versioning script ... Done. (0.4 seconds)

After:

Running versioning script ... Done. (0.4 seconds)
file ./options.dox being updated
file ./full-options-list.md being updated
Number of option files updated: 2
Total 4680 options.
Updating submodules needed for compilation.
Finished updating ResidueProperty code
-- no changes needed
Finished updating VariantType code
-- no changes needed

[roccomoretti]

No. It's somewhat surprising.